Combination oil pressure regulator and low oil pressure detector for refrigerant compressor
US4932841A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 20, 1989 |
| Grant date | Jun 12, 1990 |
| Priority date | — |
| Expiry date | Mar 20, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7835
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A combination oil pressure regulator and low oil pressure indicator for regulating the maximum oil pump pressure of a refrigerant compressor, and for providing a signal or indication when the oil pressure falls below a predetermined minimum value. The position of a piston in a housing is controlled by opposing forces provided by the oil pressure to be monitored and by a compression spring. When the oil pressure reaches a predetermined maximum value, relief apertures in the piston and housing establish a pressure relief path to the compressor crank case. When the oil pressure drops below a predetermined minimum value, the piston contacts and electrically grounds an electrically conductive element, providing a signal for associated control.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.